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https://issues.apache.org/jira/browse/IGNITE-9124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16563739#comment-16563739
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ASF GitHub Bot commented on IGNITE-9124:
----------------------------------------

GitHub user oignatenko opened a pull request:

    https://github.com/apache/ignite/pull/4462

    IGNITE-9124 Remove some dead code in ML module

    

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/gridgain/apache-ignite ignite-9124

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/ignite/pull/4462.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #4462
    
----
commit 6a92b001d65c8f39f88edf53c2487c4f32929f42
Author: Oleg Ignatenko <oignatenko@...>
Date:   2018-07-30T15:55:20Z

    IGNITE-9124 Remove some dead code in math.exceptions and optimization 
packages of ML module
    - draft removal
    -- verified with diffs overview and clean rebuild

commit 566b8e35e92d4aa39c5a79ff12f1defae9552d1e
Author: Oleg Ignatenko <oignatenko@...>
Date:   2018-07-31T14:00:09Z

    IGNITE-9124 Remove some dead code in math.exceptions and optimization 
packages of ML module
    - removal completed
    -- verified with diffs overview and clean rebuild

commit d71ddd0c9a987d98d10b38f9cf47b5ed237977e0
Author: Oleg Ignatenko <oignatenko@...>
Date:   2018-07-31T14:02:00Z

    Merge branch 'master-ml' into ignite-9124

----


> Remove some dead code in math.exceptions and optimization packages of ML 
> module
> -------------------------------------------------------------------------------
>
>                 Key: IGNITE-9124
>                 URL: https://issues.apache.org/jira/browse/IGNITE-9124
>             Project: Ignite
>          Issue Type: Task
>          Components: ml
>    Affects Versions: 2.6
>            Reporter: Oleg Ignatenko
>            Assignee: Oleg Ignatenko
>            Priority: Major
>             Fix For: 2.7
>
>
> Doing code coverage analysis discovered a bit of unused code:
>  # in package 
> [math.exceptions|https://github.com/apache/ignite/tree/master/modules/ml/src/main/java/org/apache/ignite/ml/math/exceptions]
>  - classes ConvergenceException / MathIllegalStateException, 
> InsufficientDataException, MathIllegalNumberException / 
> NumberIsTooSmallException, NonPositiveDefiniteMatrixException, 
> NonSymmetricMatrixException, NullArgumentException, SingularMatrixException, 
> UnknownProviderException. In very early releases of ML these exceptions were 
> used by some linear algebra code. This code has been very deeply reworked 
> since but outdated exceptions were left hanging unattended, making rather 
> confusing impression of the current API.
>  # in 
> [optimization|https://github.com/apache/ignite/tree/master/modules/ml/src/main/java/org/apache/ignite/ml/optimization]
>  - interface Updater and two classes implementing it: BarzilaiBorweinUpdater 
> and SimpleUpdater. This code has left hanging after cleanup that was made for 
> release 2.5 (IGNITE-8232). Per my discussion with [~dmitrievanthony] (who 
> most actively maintains this package) it would be better to remove this code.
> This task is to remove code mentioned above.



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